Received-SPF: none
 receiver=logan.com; client-ip=24.25.9.100; envelope-from=eanderson@carolina.rr.com
Message-ID: <000401c502d8$030b2260$2402a8c0@edward2>
From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-620541@logan.com>
Subject: Re: [FlyRotary] Re: Flex plate <> Flywheel [FlyRotary] Re: flex plate
Date: Tue, 25 Jan 2005 07:18:43 -0500
MIME-Version: 1.0
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: 7bit

Just shows that there was a wide variety in Ross Drive configurations and
workmanship standards.  The last time I talked with Chris Ross (son of Lou
Ross developer of drive), he mentioned that the Subaru users were having
problems with cracking the aluminum "Flex plates" - then characteristic of
Chris - suggested I send my drive back to have the flexplate changed to an
aluminum one.  I declined.

Ed A
----- Original Message -----
From: "Finn Lassen" <finn.lassen@verizon.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Monday, January 24, 2005 11:09 PM
Subject: [FlyRotary] Re: Flex plate <> Flywheel [FlyRotary] Re: flex plate


> Odd. My Ross used a custom 1/2" (I think) ALU plate with the starter
> ring gear crimped onto it.
> That plate bolts onto the automatic counterweight.
>
> The dampener assembly (with the spline for the input shaft) then bolts
> onto the ALU plate with 9 or 12  8mm allan head bolts, with 1/2" or
> maybe 3/4" ALU spacers between the dampener assembly and ALU plate.
>
> Finn
>
> Ernest Christley wrote:
>
> > Paul wrote:
> >
> >>>
> >>> What do the bolts screw into?  Rivnuts? A backing plate?
> >>>
> >>
> >> The bolts screw directly into the existing holes on the automatic
> >> transmission flex plate. (which I used to think was a flywheel, until
> >> several helpful members of the Fly Rotary list helped to educate
> >> me).  Paul Conner
> >
> >
> >
> > I've read this several times, and still not quite sure I can believe
> > it.  The flex plate I have is thin.  In the .040" range thin.  I
> > realize that it will all be shear forces, but can 9 threaded holes be
> > expected to take the 800ft/lb of reaction forces that a typical NA
> > engine is expected to put out?
> > (I believe I got the 800ft/lb number out of the discussion of the
> > Schwertz beam motor mount on PL website).  Just doesn't seem like it
> > could hold up.
> >
> >>>  Homepage:  http://www.flyrotary.com/
> >>>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
> >>
> >
>
>
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
>